Mean-field theory for quantum gauge glasses

F. Pázmándi, G. T. Zimányi and R. T. Scalettar

Physics Department, University of California - Davis, CA 95616, USA

Received:
4
November
1996
Accepted:
20
March
1997

Abstract

We develop a new field theory for the quantum gauge glass with
infinite-range interaction.
We include disorder in both
the coupling strengths and the site energies.
This model is closely related to XY magnets and bosons in random media.
For properly chosen distributions of the site disorder we find two
distinct regions, a “Weak” and a “Strong” Glass, dominated
by long-range and local fluctuations, respectively. Strikingly, at the
Strong Glass transition the non-linear susceptibility does not diverge.

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